Motion picture projection : an elementary text book (1928)

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934 MOTION PICTURE PROJECTION 3. CHIMNEY ON THE LAMPHOUSE Next place the chimney (E) on top of the lamphouse and force the chimney down tight. 4. HOW TO ATTACH THE AMMETER ON THE LAMPHOUSE Connect the two ammeter lead wires (A-2) protruding from the ammeter support (A-l) attached Fig. 396 Light Beam in Motion Picture Projection Using Piano-Convex Condensers and No. 1 Objective Lens to the upper part of the lamphouse (A) to the two large contact screws (G-l) projecting from the back of the ammeter (G) making sure that the contact nuts (G-2) are screwed down tight. Fasten the ammeter (G) to the ammeter support (A-l) with the three long ammeter attaching screws (G-3) by screwing them from the back of the ammeter support (A-l) into the back plate (G-4) of the ammeter (G).